Overview
The ADT75ARM-REEL, produced by Analog Devices Inc., is a complete temperature monitoring system. It is available in 8-lead MSOP and SOIC packages, incorporating a band gap temperature sensor and a 12-bit analog-to-digital converter (ADC). This device is designed to monitor and digitize temperature with high accuracy and resolution.
The ADT75 is pin and register compatible with the LM75 and AD7416, making it a versatile option for various applications. It operates over a wide supply voltage range of 2.7 V to 5.5 V and is rated for operation over the −55°C to +125°C temperature range.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 2.7 | 5.5 | V | ||
| Operating Temperature Range | −55 | +125 | °C | ||
| Average Supply Current at 3.3 V | 200 | µA | |||
| Shutdown Current | 3 | µA | |||
| ADC Resolution | 12 bits | ||||
| Temperature Resolution | 0.0625 | °C | |||
| Temperature Conversion Time | 60 | ms | |||
| Update Rate | 100 | ms | Conversion started every 100 ms | ||
| Long Term Drift | 0.08 | °C | Drift over 10 years, if part is operated at 55°C | ||
| Temperature Hysteresis | 0.03 | °C | Temperature cycle = 25°C to 125°C to 25°C | ||
| OS/ALERT Output Low Voltage (VOL) | 0.4 | V | IOL = 3 mA |
Key Features
- High accuracy temperature sensor with ±2°C accuracy from −25°C to +100°C and ±3°C accuracy from −55°C to +100°C
- 12-bit analog-to-digital converter (ADC) providing a temperature resolution of 0.0625°C
- Operates over a wide supply voltage range of 2.7 V to 5.5 V
- Shutdown mode with a current of typically 3 µA
- SMBus/I2C-compatible serial interface
- Open-drain output (OS/ALERT pin) that becomes active when temperature exceeds a programmable limit, operable in comparator or interrupt mode
- Address selection pins (A0, A1, A2) for multiple device operation
- Compact 8-lead MSOP and SOIC packages
Applications
- Portable battery-powered instruments
- Personal computers and office equipment
- Telecommunications systems
- Domestic appliances
- Process control systems
- Industrial automation
- Medical devices requiring precise temperature monitoring
Q & A
- What is the operating temperature range of the ADT75?
The ADT75 operates over a temperature range of −55°C to +125°C.
- What is the resolution of the temperature sensor in the ADT75?
The temperature sensor has a resolution of 0.0625°C.
- What is the supply voltage range for the ADT75?
The ADT75 operates with a supply voltage range of 2.7 V to 5.5 V.
- What is the typical shutdown current of the ADT75?
The typical shutdown current is 3 µA.
- What type of serial interface does the ADT75 support?
The ADT75 supports an SMBus/I2C-compatible serial interface.
- How does the OS/ALERT pin function?
The OS/ALERT pin is an open-drain output that becomes active when the temperature exceeds a programmable limit and can operate in either comparator or interrupt mode.
- What are the package options for the ADT75?
The ADT75 is available in 8-lead MSOP and SOIC packages.
- What is the accuracy of the temperature sensor in the ADT75?
The temperature sensor has an accuracy of ±2°C from −25°C to +100°C and ±3°C from −55°C to +100°C.
- How often does the ADT75 update the temperature reading?
The ADT75 updates the temperature reading every 100 ms.
- What is the long-term drift of the ADT75 temperature sensor?
The long-term drift is 0.08°C over 10 years if operated at 55°C.
